Open AccessPropagation characteristics and quantification analysis of harmonic current in large‐scale wind farms
Author(s) -
Shi Jinhui,
Chen Wei,
Wei Zhanhong,
Pei Xiping,
Sun Xuebo
Publication year - 2023
Publication title -
energy science and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.638
H-Index - 29
ISSN - 2050-0505
DOI - 10.1002/ese3.1343
Subject(s) - harmonic , harmonic analysis , decoupling (probability) , wind power , electric power system , harmonics , grid , electrical impedance , power electronics , electrical engineering , electronic engineering , engineering , power (physics) , acoustics , physics , voltage , mathematics , geometry , control engineering , quantum mechanics
These days, the harmonic problem of wind power grid‐connected systems is becoming increasingly prominent due to the increase in the number of large‐scale centralized grid‐connected wind farms and the gradual trend of high‐proportion power electronics for source‐grid loads. The harmonic oscillation caused by power electronic equipment provides large‐scale propagating in the system, and the harmonic interaction makes the harmonic propagation more complex. First, the harmonic interaction of the system is simplified into the radiation relationship between the wind farm and each branch to solve the harmonic current propagation problem caused by the interaction in the multiple wind farms. Then, the branch harmonic current propagation analysis method is used to transfer harmonic impedance and generate the branch harmonic current decoupling. Second, a harmonic current propagation coefficient is proposed to quantitatively analyze the relationship between the harmonic current of the wind farm and the branch. Thereby, the quantitative analysis of the propagation characteristics for the wind farm harmonic current in the system branch is obtained. Finally, abundant simulations verify the effectiveness and feasibility of the proposed method.